use std::collections::HashMap;
use std::sync::Arc;
use parking_lot::RwLock;
use crate::actor::PID;
use crate::remote::config::RemoteConfig;
use crate::system::ActorSystem;

/// Endpoint manager - manages remote endpoints
pub struct EndpointManager {
    /// Map of addresses to endpoints
    endpoints: RwLock<HashMap<String, Arc<Endpoint>>>,
    /// Actor system
    system: ActorSystem,
    /// Remote configuration
    config: Arc<RemoteConfig>,
}

impl EndpointManager {
    /// Create a new endpoint manager
    pub fn new(system: ActorSystem, config: RemoteConfig) -> Self {
        Self {
            endpoints: RwLock::new(HashMap::new()),
            system,
            config: Arc::new(config),
        }
    }
    
    /// Get an endpoint by address
    pub fn get_endpoint(&self, address: &str) -> Option<Arc<Endpoint>> {
        self.endpoints.read().get(address).cloned()
    }
    
    /// Get or create an endpoint
    pub fn get_or_create_endpoint(&self, address: &str) -> Arc<Endpoint> {
        if let Some(endpoint) = self.get_endpoint(address) {
            return endpoint;
        }
        
        let mut endpoints = self.endpoints.write();
        if let Some(endpoint) = endpoints.get(address) {
            return endpoint.clone();
        }
        
        let endpoint = Arc::new(Endpoint::new(
            address.to_string(),
            self.system.clone(),
            Arc::clone(&self.config),
        ));
        
        endpoints.insert(address.to_string(), Arc::clone(&endpoint));
        endpoint
    }
    
    /// Stop all endpoints
    pub fn stop_all(&self) {
        let endpoints = self.endpoints.read();
        for (_, endpoint) in endpoints.iter() {
            endpoint.stop();
        }
    }
}

/// Remote endpoint
pub struct Endpoint {
    /// Address of the remote system
    address: String,
    /// Actor system
    system: ActorSystem,
    /// Remote configuration
    config: Arc<RemoteConfig>,
}

impl Endpoint {
    /// Create a new endpoint
    pub fn new(address: String, system: ActorSystem, config: Arc<RemoteConfig>) -> Self {
        Self {
            address,
            system,
            config,
        }
    }
    
    /// Send a message to a remote actor
    pub fn send_message(&self, target: &PID, sender: &PID, message: Box<dyn std::any::Any + Send + Sync>) {
        // TODO: Implement message sending
    }
    
    /// Watch a remote actor
    pub fn watch(&self, watcher: &PID, target: &PID) {
        // TODO: Implement watch
    }
    
    /// Unwatch a remote actor
    pub fn unwatch(&self, watcher: &PID, target: &PID) {
        // TODO: Implement unwatch
    }
    
    /// Stop the endpoint
    pub fn stop(&self) {
        // TODO: Implement stop
    }
} 